sort of important: variable and inner class name changes for broadcast receivers in DineOnUserActivity and DineOnRestaurantActivity

Changed some variable name to be more conducive to our style. Namely preceding activity field names the "m". Specifically I changed thisRestaurant to mRestaurant and also MikesReceiver is now changed to something more related to it functionality. Sorry Mike, I know you always wanted a broadcast receiver named after you. Maybe next time. Tested with most recent changes as of about five minutes ago. mock QRcode now in repo.